OF ARTS AND SCIENCES. 55 



Bigelovia venkta, Gray, var. (?), with small heads and the leaves 

 mostly entire, somewhat pubescent. On an island in Guaymas har- 

 bor. (334.) 



Psilactis Coulteei, Gray. In waste places at Guaymas. (99.) 



Aster frutescens. Shrubby " with very compact rounded top," 

 with gray stem and branches, the herbaceous portion glandular- 

 scabrous: leaves oblong-obovate to oblanceolate, an inch long or less, 

 the lower attenuate to a narrow base, the upper sessile by a broader 

 or somewhat clasping or even subcordate base, coarsely spinulose- 

 dentate, rather rigid and conspicuously reticulate, sparingly glandular- 

 scabrous : heads solitary and terminal on the leafy branchlets, large 

 (5 or 6 lines high) ; bracts of the involucre loosely imbricated, linear, 

 narrowly acuminate, the green tips somewhat spreading; rays "lilac," 

 about 20, rather short ; achenes canescent with subappressed hairs, 

 nerved, subcompressed ; pappus whitish. — A species of peculiar habit. 

 most nearly related to the section Me gala strum, but the heads smaller 

 and not naked-pedunculate. On a stony ridge near Los Angeles Bay. 

 (513.) 



Baccharis sarothroides, Gray. "Yerba del pasmo " ; the 

 twigs are used as a remedy for toothache. Rarely over 2 feet high. 

 San Pedro Martin Island. (414, 415.) 



Pelucha* trifida. A much branched and leafy shrub, about 3 

 feet high, canescent with a thin fine close tomentum : leaves linear 

 with a broader obtusely 3-toothed or usually 3-cleft summit, G to 9 

 lines long: heads about 2 lines high, mostly 10-15-flowered : achene 

 hispid. — On San Pedro Martin Island, in crevices of rocks near the 

 sea. (407.) 



Lagascea decipiens, Hemsl. A compact shrub, 4 feet high. 

 Mountain ravines above Guaymas. (256.) 



Franseria ambrosioides, Cav. At Muleje and Guaymas. (21.) 



Franseria ilicifolia, Gray. Stems herbaceous, li feet high. 

 Ravines near Los Angeles Bay. (578.) 



* PELUCHA, a new genus of Plucheinece. Beads discoid, rather few- 



flowered, homogamous, the flowers all perfect or some Bterile. [nvolucre of two 

 rows of nearly equal linear herbaceous bract-. Receptacle naked. Corolla 

 slender, slightly dilated upward, very shortly toothed. Anthers very narrowly 

 sagittate at base. Style-branches narrow, or the Btyle Bometimes undid 

 Achene small ; pappus rigid, scabrous. — Shrubby, very heavy — nt< d, toraen 

 tuloso, with alternate 3-fid leaves and small heads in terminal cymes. Closelj 

 allied to Blumea and Pluchea. The specimens .-ire not in very good condition, 

 but a careful study of the material leaves little doubt of the distinctneM and 

 tribal position of the genus. 



